Reinforcing-bar.



P. KUHNE.

REINFORCING BAR.

APPLICATION FILED JUNE 10.1918.

1 ,280, 04 6 V Patented Sept. 24, 1918'.

Z i f I I QUOTA mag an sans earner @JFFJZGl PAUL KUHNE, OF BIRMINGHAM, ALABAMA, ASSIGNOR OF ONE-HALF '10 WERNER KUHNE, OF BIRMINGHAM, ALABAMA.

REINronoIne-Ban.

Specification of Letters Patent. Patrg mtedl Sept, 2%, 1918,, I

Application filed June 10, 1918. Serial No. 239,202.

To all whom it may concern.

Be it known that 1, PAUL KUHNE, citizen of the United States of America, residing at Birmingham, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Reinforcing-Bars, of which the following is a specification.

This invention relates to. improvements in bars for reinforcing concrete bodies.

The prime object of the invention is to provide a bar-having means formed therewith to strengthen the structure, and so arranged as topermi't" of a'similar section of the bar being employed to match with and be tied to the main bar to afford reinforcement .of the structure at any particular point or points throughout its length.

A further object of the invention is to provide a bar of the type described, with projections and depressions, so arranged as to afford gripping points for the concrete to take hold and bind the parts together, and to afford means forattaching a binder to tie two sections of the bar together.

The invention also comprehends improvements in the details of construction and arrangement of parts, which will be hereinafter described and particularly pointed out in the claims.

.In the accompanying drawings Figure 1 is a perspective view of my improved bar,

Fig. 2 is an edge view partially in section of the bar, and illustrating a supplemental bar,

Fig. 3 is a detail cross-section of same,

Fig. 4 is a detail edge view illustrating overlapping ends of a main and a supplemental bar, tied together.

1 indicates a metal bar of suitable length, thicker in one cross section than in the right angular cross section, whereby two fiat sides 2, 2 are provided, and two edges 3, 3. At regular spaced intervals on the flat sides are projections 4, 4, each having its edges beveled as at 5, 5. The projections 4 on one side are disposed in lines intermediate the projections on the opposite sides, as clearly shown in Fig. 2. The sides are also formed with depressions 6,6, each of which is of exactly the samej'shape and contour as the pro ections 4. The depressions 6, on one side are in alinementwith the pro ections .on the opposite side, the result being that each side is formed with a regular uniform series of alternate'depressions and projections of the same shape, the depressions and projections being removed from the side edges of the bar as shown.

, The edges 3,3, are provided with a plurality of side depressions 7, 7 and corresponding projections 8, 8, and central ribs 9, 9. The depressions 7, 7 and the projections 8, 8 are of exactly the same shape and contour, and in each instance they are arranged so that a pair of depressions 7, 7 will always occur between a pair of adjacent projections 4 and depressions 6, on the sides.

A bar of this construction afiords ample irregular surfaces on all edgesto form an effective binder for the concrete when in use. If it be desired to strengthen the end portions, or an intermediate portion of the bar 1, a supplemental section or sections 10 of the bar may be employed. This supplemental section 10, is constructed exactly the same as the bar 1, hence the projections snugly fit in the depressions and thereby form an interlock between the bars. To permanently hold the bars together, wire binders, such as indicated at 11, are used. These binders are passed around the main and supplemental bars and engage in the depressions 7, which holds the wire against slipping, the wire of course adding to the structure another binding element for the concrete.

The construction and arrangement of the bar is such as to provide a simple means for reinforcing at any particular point in the length ofthe main bar. and effective surfaces are provided for the concrete to grasp and hold to the structure.

What I claim is 1. A reinforcing bar for concrete work having spaced alined depressions and projections of similar shape on opposite sides, at poin s removed from the edges of said bar, the edges of the bar having transverse projections and depressions, certain ofthe latter depressions being disposed between the first mentioned alined depressions and projections. v

2. A reinforcing bar for concrete work having spaced alined depressions and projections of similar shape on opposite sides, and having each edge provided with opposite depressions and intermediate projections, and having a central rib in the latter depressions, certain of the latter depressions being disposed between the first mentioned .5 alined depressions and projections.

3. A reinforcing bar for concrete WOIk having its opposlte edges provided with depressions and projections and a central iii) in the depressions and connecting the adjacent projections, the sides of the bar having 10 projections and depressions.

' In testimony whereof I affix my signature.

PAUL KUHNE. 

